Saw-setting machine.



UNITED STATES PATENT @FFTQE.

.SAW-SETTING IVlACHlNEf Specification of Letters Patent.

Patented May '7, 1907.

Application filed December 9,1905. Serial No. 291,086.

To an whom it may concern.-

Be it known that I, THOMAS OLIMGMAN HoLscLAw, a citizen of the United States, residing at Etowah, in the county of Henderson and State of North Carolina, have invented certain new and useful Improvements in Saw-Setting Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in machines for setting the teeth of saws and its object is to provide a simple and practical means by which the teeth of a saw may be quickly and uniformly set without liability of breaking any of them.

With the above and other objects in view, the invention consists in the novel construction, combination and arrangement of parts hereinafter fully described and claimed, and illustrated in accompanying drawing in which: t

Figure l is a side elevation of my improved saw setting machine; and Fig. 2 is a perspective view of a portion of the setting wheel.

Referring to the drawings by numeral, 1 denotes a saw clamp comprising two similar clamping plates 2 between which the saw 3 is held. These plates may be of any desired form and construction, and may be held in clamping relation by any suitable means. As shown the latter is accomplished by coil springs 4 arranged beneath the plates near their ends, the terminals of the springs being seated in the plates. A set screw 5 may also be employed for clamping the plates upon the saw. Neareach end the plates are provided with a vertically arranged series of holes 6 to receive suitable pins 7 adapted to project transverse the space between the plates and provide an adjustable rest for supporting the teeth of the saw in proper relation above the upper edges of the plates.

The outer faces of the plates, near their upper edge are formed with longitudinally arranged grooves 8 the lower walls of which are preferably undercut. Slide bars 9 are arranged for longitudinal movement in the guide grooves 8 and are preferably provided on their upper edges with rollers 10 to bear against the upper walls of the grooves and reduce friction incident to the movement of the bars. Near their opposite ends each bar is provided with a sleeve bearing 11, in which earings are fixedly supported front and rear sup orting frames 12, 13, each preferably U-s aped with its ends engaging the similarly-arranged sleeves of each of the bars. These supporting frames are adapted to receive and adjust-ably support the setting frame comprising a lever 14 pivotally secured at 15 to the forward supporting frame and adjustably connected to the rear supporting frame, said lever being arranged directly above the meeting edges of the clamp plates 2. Adjacent to the forward supporting frame 12, the setting lever is widened and formed with a longitudinally-arranged opening 16 in which is revolubly mounted the setting wheel 17 hereinafter described. The rear or handle end of the lever is formed with a sleeve enlargement 18 to receive a screw threaded stud 19 projecting vertically and centrally from the rear supporting frame 13, adjusting nuts 20, 21 being arranged for threaded engagement with the stud above and below the lever. That portion of the lever supporting the setting wheel is preferably offset or in a lower plane than the remainder of the lever to provide for theuse of a small setting wheel.

The setting wheel 17 is of disk shape and adapted for revoluble support between the walls of the slot 16 in the setting lever. The periphery of the wheel is formed with setting recesses or notches 22, opening from the opposite surfaces of the wheel toward the center and being arranged in offset relation transverse the wheel, so that a notch on one side of the wheel is arranged directly between two notches on the opposite side of the wheel. The inner wall of each of the notches inclines from the periphery of the wheel outwardly toward its center, as at 23, and the end walls of the notches incline toward each other or converge toward the center of the wheel, all as clearly shown in Fig. 2.

In operation, the saw is secured in the clamp as shown and the lever is then adjusted vertically by means of the nuts 20, 21 in order to cause the notches or recesses of the setting wheel to engage the respective "teeth of the saw. The wheel is then moved longitudinally of the saw, the movement being effected by the sliding engagement of the bars 9 with the clamping plates. The respective recesses .or notches 22 will engage the teeth as the wheel revolves longitudinally of the saw blade, the recess on one side of the wheel engaging one tooth and the adjacent recess on the opposite side of the wheel engaging the next succeeding tooth. Owing to the inclined walls 23 of these recesses the respec- IIO tive teeth are inclined from the vertical, thereby giving the teeth the proper set.

Having thus described my said invention, What I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a device of the character described, a saw supporting means having a guide, a bar slidable in said guide, arms carried by said bar, a lever pivoted upon one of said arms, a screw upon the other of said arms, and projecting through an opening in said lever, nuts upon said screw on opposite faces of said lever, and a saw setting wheel revol-ubly supported upon said lever.

2; In a device of the character described, a saw clamp comprising jaws or plates having guide grooves in their outer faces, bars slidable longitudinally in said grooves, U-shaped frames connecting said bars, a lever pivoted upon one of said frames, a screw upon the other of said frames and projecting through an opening in said lever, nuts upon said screw on opposite faces of the lever, and a saw setting wheel revolubly mounted upon said lever and having a notched periphery, substantially as described.

In testimony whereof he hereunto aifixes his signature in presence of two witnesses. THOMAS CLIM-GMA-N HOLSOLAW. Witnesses:

J. J. SHIPMAN, A. L. I-IARDIN. 

